Furnace



Aug. 19, 1930. 7 5, DAN|EL$ 1,773,520

' FURNACE 7 Sheets-Sheet 1' Filed Jan. 19, 1929 Ira/8'72 for M/Mmmnnsm Aug. 19, 1 930. 5, DANIELS 1,773,520 7 FURNACE Filed- Jan. 19, 1929 '7 Sheets-Sheet 2 R By ATTORNEYS S. DANIELS v FURNACE -Aug. 19, 1930.

Filed Jan. 19, 1929 7 Sheets-Sheet v 3 1 Ina/dutch Z70 727625 W/WTQRNQQ Aug. 19, 1930. s. DANIEL-S 2 FURNACE Filed Jan. 19, 1929 7 Sheets-Sheet 4 7 Jnuerzian 6 67 7 v gamaellh zzls QMWM l -A\ 1g.19, 1930. Y s. DANIELS 1 173,520

- FURNACE Filed Jan. 19, 1929 7 Sheets-Sheet 5 llllllllllllIIIIIIIIIIIIIIIIIIIIIIIIIIII 607222419X fla'izz'ez's wlm tgpww w NE Aug. 19, 1930. s, DAMELs 1,773,520 FURNACE Filed Jan. 19, 1929 7 SheetsSheet s UUUUUHUUAUHUU UUUUUHUUUUU @UUUUHUUUUU Aug. '19, 1930.

5. DANIELS FURNACE Filed Jan. 19, 1929 7 Sheets-Sheet 7 jnverzian Patented Aug. 19, 1930 1 time:

SAMUEL DANIELS, or HARDWICK, VERMONT, ASSIGNOR rosaivr DANIELS rare, mo,

OF nannwionvnnnonr, a oonrona'rron or vnmvronr FURNACE Application filed January 19, 1929. Serial No. 333,587.

This invention relates toimprovements in furnaces and more particularly it relates to hot air heating plants.

An object of theinvention is the provision of a furnace structure which maybe readily assembled in a. minimum time and is of simpledesign r i g 7 Another object is to provide a furnace structure in which the casingmay be erected fi st and the furnace unit can be slidably inserted therein afterwarcs, thus enabling the rapid setting upof the furnace, as it is unnecessaryto substantially delay-the setting up of the furnace during the drying of the cement foundation.

A further-object is the provision of a sec tional casing having readily removable panels for access to the interior thereof and for ready removal of the furnace unit therefrom.

Another object is the provision of a novel form offurn'aoe' structure including a novel self-sustaining casing and a novelfurnace unit removably disposed therein.

These and manyother objects I attainby the construction shown 1n the accompanying drawings wherein forthe purpose of ii lustration is shown a preferred embodiment of my invention and wherein'i Fig. 1 is a. front elevationof my furnace structure with the parts assembled. Fig. 2 is a rear view of the same.- Fig. 3 is aside view-of'the ture.

Fig. 5 is'a plan view of'the'base.

Fi 6 is a side sectional elevation substan tially on line 6+6 of F1g.11. p v I v Fig. 7 is a fragmentary sectlonal view substantially on line 77 of Fig. 1.

Fig. 8 is a front sectionalelevation substantially on line 8-8 of Fig. 6.

Fig. 9 is a sectional planview taken Sllb't sembly and a portion of the rear wall-and furnace struc-" Fig. 4; is a front elevation ofthe 'supporting base.

"front endiof the casin a portion of one of the front panels showin the grooves to receive the top section.

Fig. 12 is a bottom plan view of the top section. l

Fig. 13-is a section onthe line13- 13 of Fig. 6, showing'thesmolte pipe connection.

Fig. 14 is a section on the line I l-+14 of Fig. 6.

Fig. 15 isa rear view of'the feed tube. Fig. 16 is a view of the feed tube collar. Fig. 17 is a rear view of one of the removable side'panels for the front showing the waterpan connected therewith.

Fig. 18 is a section on line 1818 of Fig. 17. Fig. 19 is a section on line 19--19 of Fig. 17. 05 i Fig. 20 is a view of the removable top panel of the front. of Fig; 21 is a section on the line 2121' of Fig-.20.. i

Fig. 22 is a view of a modified form of pit 5'0 less furnace structure embodying the removthereina hot air outlet and an unheated air inlet. A rear wall comprising aback made of double sheet metal with a central air space and end panels 44, joins the side walls 45. 3

The back wall55 provides an opening there'-f in for a smoke pipe. v

Endpanels 44; are also provided at the one joined to each ofthe sidewalls 45 at their front edges. so

A top portion C for said casingis joined to said side and rearwalls and end panels, and comprises upper front and rear wall portions 46 joined byside portions 47, inclining upwardly and inwardly and providingan as opening in-the top partially closed at its front v and rear ends by top-panels 48. A rectangular cold air pipe 49 extends upwardly from said topfportion openingfand supports a reg 1ster (iik atits upper end.

. pit.

- of the casing and supporting an inside top portion 59, separating the inner hot air chamber A from the cold air chamber B. The inner walls 63 are of double formation and provide a dead air space which serves as an insulation between the hot and cold air chamber. The inner walls 63 and the inner top are supported by their connection with the end panels 44 and rear wall, the walls 63. at their lower ends terminating short of the base to provide communication be-' tween the space B and space A.

The inside top portion 59 is provided with a hot air pipe within the cold air pipe 49 and spaced therefrom, the pipe 60 extending upwardly into a slip joint connection with a short hot air pipe 61' depending from the register 62.

The cold air enters through the register and through the space between the pipes 60 and 49 and passes through the'cold air space 13 and under each of the inner walls 63 into the hot air chamber A where the furnace unit is disposed in spaced relation to the walls ofthe hot air chamber A.

The ash-pit portion 20 supporting the the pot 27 of the furnace unit is slid into. the furnace upon tracks 66 on the base 40 having guides 67 engaging the sides of the ash WVhen the furnace unit is in place, the opening in the front wall is closed by the panels 43, 41, wing plates 39 bracing the front end of the casing, the ash pit front 3 and the feedtube front 68,. The wing plates 39 are secured to the panels 44 and to the base 40 to brace the-same and the space between wingplates 39 is closed by the ash pit front 3. The panels 41, preferably of galvanized iron as is the rest of the casing, are provided with flanges forming grooves 41 on two sides for cooperation with the corresponding edges presented by the end panels 44, the feed tube front and the panel 21 interposed between the ash pit front, the panel 21 the feed tube front and also having a lower flange forming a groove 21*- for engagement w1th the upper edge presented by the said ash pit front.

The panels 41 are provided with grooves 41 at their lower ends engaging wing plates 39.

' The upper panel 43 is provided with upper andlower flanges 43 presenting upper and lower grooves for engagement with the edges presented by the upper side of the feed tube front, the upper ends of panels 41 and the lower end of upper front 46. Guide ribs 64 are provided on the end panels 44.

Thefront of the casing with the furnace in place is then completely closed, with the front panels removable. The end panels 44 are provided with flanges or clips 51 and 52 forming grooves at the top and bottom thereof to receive the edges presented by the lower end of upper front wall portion 46 and the base 40, respectively. These end panels and the remainder of the sectional casing are provided with interlocking tongue and groove connections and are provided with a few retaining bolts to prevent discon- 'nection, thus forming a rigid casing structure with the front removed and which can be moved about independently, and tipped upon its edges without collapse or disarrangement of parts. The outside side walls 45 are provided with upper and lower clips 53 for engagement with the outside top portion and thebase 40 respectively. The inside top 59 is provided with a hem 59 at its front end turned up to receive the lower edge of front wall portion 46 of the outside top C.

The furnace unit comprises'the firepotl27 and the ashpit 20 supporting the firepot and extending forwardly beyond the iirepot to space the same from the sectional front wall of the furnace casing.

Theash pit 20 comprises a sheet metal box with the ashpit front 3 mounted at itsfront end, and ashpit frame 16 resting on top of the box and bolted to'the ashpit front 3.

having slot 6 therein for loosely receiving the lower end of shaker handle 19, and ashpit door 2 having draft door 1 thereon operated by chains or the like from above to regulate the air under the grate bars for combustion.

Shaker bar 23 is pivotally secured to the shaker handle 19 and extends rearw'ardly through the front 3 into the ashpit. The shaker handle 19 is provided with a shaker bar stop 15, pivotally secured thereto and adapted to be swung to lie on top of the shaker bar or will tip over to allow the shaker bar to slide in and out to rock the grate bars The stop 15 when tipped to lie on top of the shaker bar provides the correct space between the shaker handle and the ashpit front to set the grate bars in level position.

The grate bars are mounted to rockin the frame 16 which comprises grate bars rests 22 bolted to the top of the ashpit. The grate bars rests have studs 22 to rockabl'y receive the grate bars 29at one end of each of which is the lever arm 30 carrying a. stud 3O for engaging a corresponding aperture 23 in the shaker bar. The lever 30 is provided with a hole '30 to receive a stud 22 and the opposite end of the grate bars is'provided with a U- shaped notch to rest on the opposite stud 22*. The studs 30 of lever arms 30 of the various grate bars, of which three are shown (but any desired number, as three, four, or five grate bars may be used with furnaces the Secured to the ashpit front 3 is ashpit door L hin 'e 4 ash 1t door catch 5 shaker lu 6 CS 7 7 b 7 bar tobe rocked thereby.

The firepot is bolted to the 18 are boltedtogether throughlugs 7 0, The feed tube 7 extends forwardly from the firepot and spaces the same from the front wall of the casing. The feed tube has a flange 71 thereon engaging the outside of the front wall 26 of the firepot at the feed opening and a collar 13 onthe insideof the wall '26bolts through the flange .71 and holds it to the firepot. p

I The feed tube front 68 comprises a feed door hinge member 11 secured'to the right side of theopen mouth'ofthe' feed pouch, a feed door catch member 12 secured to theleft side ofthe feed tube mouth, upper and lower sheet iron flanges 38 and 28' connecting 11 and 12, and a door 8 provided 'with acold air draftt). k

The door 8 is prov'ded with a feed door lining'comprising a plate 10 having a rearwardlyextending flattened hotblast tube 1O subjectto the heat in the firepot to preheat the-cold air entering through draft door 9 operatedthrough eye 9 by chains from above.

At the inside end of the feed pouch is a feed-pouch'apron 14 to hold the front bricks E in-place. This apron is bolted to the bottom ofthe feed tube and'has a depending inner'fiange lt overlying and protecting the top'en'ds of the firej bricks.

Bricks F, larger and longer than the front bricks E are disposed at the sides and back of the firep'otf All of the bricks are "supported upon the firepot frame 18. Casting 35 is disposed atthe rearwall of the. firepot and has a depending flange 35 to overlie and hold the bricks in'place. Castings 36 at the'sides of the firepot protect and hold the side bricks in place.

Inthe smoke opening in the rear wall 25 of the firepotis mounteda smoke collar 32 having a flange 32* engaging the'outside of the rear wall. The smokecollar projects inwardly of the wall 25 and receives 'onits. inner end a'smoke collar ring 33 bolted to the inner face of the wall 25 and'an elbow 34: attached to the inner'end of the smoke collar by means of pins. The elbow 34: is. preferablymade in two parts bolted together and is disposed with its open end' up to receive the smoke accumulating in the curved dome 27 of the firepot. On the outer end of the smoke collar is secured smoke collar extension 37which preferfirepot frame 18 and issupported'thereon. Frames 16 and tends across the coldair'chamber between the inner and outer side walls.

The inside; top 59 is preferably lined'with asbestos.

My furnace is designed to provide standard parts so far as the width of the furnace is concerned and to provide for changing the depth ofthe furnace from front to rear Without altering the width of the furnace.-

Thus furnaces having two, three, four, or five grates may be provided having different depths from front to rear, but the widthof the parts remaining standard.

A standard set of removable panels for the front of the casing is applicable to all'depths b of furnaces made according tO'llly invention.

The front panels are removable to permit the removal o'f the firepot and ashpit with-. out the use of any tools. The side wall's'ofl the casing are made in different lengths :for the diflerent depths of furnaces according to the number of grates used. The back of the I casing is standard for all sizes ,of furnaces The casing being composed of sections of sheet metal such as galvanizediron or the like, it may be said generally that the frontand rear parts or sections are standard and the side portions are varied according to the num 1 her of grates used, thus enabling the produce tion of a large number of standard parts for all sizes of furnaces.

The coal furnace is made in three different styles of casing; i. e., the pipeless furnace casing shown in the drawings,-the'pitless casing,

which is used forpipe jobs, and the regular casing.

A pitless casing embodying features of my invention including the three removable panels and removable furnace features is The pitless furnace casing provides hotalr shown in Fig. 22.

outlet pipes at the top and cold air recold air to the hot'air Chamber103 which return pipes 101 at the sidesconnectingewith cold air closed Qtop casings 102'whichadmit A movably receives the furnace 104. The rempz vable panels are shown.at'1 05, 106 and 10. a

The regular same three panels" and, removableifurnace the whole casing assemblyf-or all styles*of casing. ,7

The feed door assemblyon the furnace, the front end of the firepot, the'back end, the

smoke collar assembly, and the ash pit as-.

sembly front and back ends, are the same in all sizes of furnaces.

furnace casing' "embodies the features ofmy invention but difiers from the -011 said cold air pipe, a hot air pipe mounted To make the next size of furnace, it is only necessary to provide a corresponding length of grate rest 22, bottom side of firepot frame 16, castings 36 to go on top of side firebr-icks', a firepot cover 27 providing sides and curved top, an extra grate and two extra firebricks, one on each side. The other parts of the furnace are standard. Everything pertaining to the width of the furnace back and front endsis standard.

I do not wish to limit myself to the exact structure shown in the drawings and particularly described as it willbe understood that many modifications may be made within the scope of the invention.

'lhe pipeless furnace siio'wn'isadapted for the burning of coal.

While Fig. 22 shows a wood burning furnace within the pitless caslng, the pitless cas- .ing is equally adaptable to receive a coal furnace such as shown in Fig. 1 and throughout the other figures of the drawings.

Certain subject matte disclosed in this applicaiion' is contained in my co-pending divisional application, Ser. No. 4%,771.

I claim:

1. In combination in a furnace, an independent self-supporting casing comprising side walls and a rear wall joining the side walls, a top portion having an opening therein and connected to the side and end walls,

inner side walls spaced from said side walls and forming therebetween a hot air chamber for receiving a furnace unit, end panels closing the space between the ends of each pair of inner and outer side walls, and a cover portion for said hot air chamber connected to the inner side walls and having an opening registering with saidfirst nientionedopenin g, the front end of said hot air chamber being open to receive the furnace unit.

2. A furnace according to claim 1 in which saidtop portion of thecasing has vertical end walls and hor1z-ontaltop panels andinclmed side Walls forming said opening, a cold air pipe mounted on said topportlon 1n registrationwith said opening, a register mounted on top of said cover portion for the hot air chamberandextending upwardly within the cold air pipe and spaced therefrom into engagementwith'a relatively short hot air pipe depending from the said register.

3. A furnace according to claim 1 in which the rear wall of the casing is provided with an opening for the smoke pipe, a base for said furnace casing and furnace unit comprising a framework of angle iron, and panels for closing the front end of the hot air casing including an upper front panel above the-furnace feed tube, intermediate panels below the upper panel and at the sides of the furnace feed tube between the latter andthe end panels ,ofthe casing, a spacer panel between the feed tube and the ash pit front of the furnace and between said intermediate panels, and wing plates at each side of the ash pit front secured to the base and to the casin to brace the same, said panels and casing being inter connected by tongue and groove connections, and said panels being provided with handles to facilitate connection and disconnection thereof.

4. In a furnace, a sectional casing providing an air inlet and outlet and a furnace unit for reception within said casing in spaced relation thereto, the open front of said casing being closed, in part by the ashpit front and feed tube front of the furnace unit and in part by removable sheet metal sections having interning tongue '7 and "groove connections with the casing and with the flanges of the ashpit and feed tube fronts.

5. In combination in a furnace having an independent furnace unit removable as a unit from an independent casing, said casing comprising an upstanding main portion having side walls, end panels at each side joiningto each side wall at the front and rear extremities thereof and extending inwardly therefrom, front and back upper wall portions joining the tops of said front and rear end panels and in the planes thereof, said upper wall portions having inwardly and upwardly inclined side edges, shoulder portions coextensive with and joining the tops of the side walls and inclining upwardly against said side edges, transverse horizontal top panels at the front and rear of said casing and joining said opposite inclined shoulder portions and extending inwardly from the tops of the said upper wall portions, the inner edges of said top panels and the top edges of said inclined shoulder portions forming a rectangular opening, inner side walls supported at the inner side edges of the said end panels and iii-spaced parallel relation to said outer side walls and terminating short of the lower edges of the outer'side walls, a rear wall connecting the inner side edges of the opposite rear end panels and forming with the inner side walls a hot air chamber for receiving a furnace unit, a cover portion for said hot airchamber connected to the inner side walls and having an opening in spaced registry with said first mentioned rectangular opening, a cold air pipe mounted on said casing at said rectangular opening, and a hot air pipe mounted on said cover portion of the hot air chamber at the opening therein, said hot air pipe extending upwardly within and spaced from said cold air pipe; said inner side walls forming with the outer side walls coldair inlet passages at the sides only of said casing, a base for said furnace casing and unit and readily, removable panelsfor closing the front end of the hot air casing with the furnace unit in place. 6. ;In a furnace according to claim 5, readilyremovable panels for closing the front end of the hot air casing with the furnace a hem turned up to receive the lower edge unit in place, including an upper front panel of the front upper Wall portion of the outabove the furnace feed tube, intermediate side top. w

panels below the upperpanel and-at the sides In testlmony whereof, I afiix my signature.

of the furnace feed tube between the latter SAMUEL DANIELS. 70 and the end panels of the casing, a spacer a panel between'the feed tube and the ash .pit front of'the furnace and between said inter mediate panels, wing plates at each side of v the ash pit front secured to the base, said a g 75 panels and casing being interconnected by tongue and groove connections, the said end panels being provided with flanges or clips forming grooves at the topand bottom thereend of the upper front wall portion and the base, guide ribs extending inwardly from the connection of the front end panels to the inner side walls; said upper front panel having 7 upper and lower flanges presenting upper v a g5 and lower grooves for engagement with the edges presented by; the lowerend of the upper front wall, the upper side of the feed tube front, and the upper ends of the inter- I mediate panels; said intermediate panels 90 having flanges forming grooves on each side I and at the bottom for engaging the side edges presented by the guide rib of the end panels,

the feed tube front, the spacer panel, and the.

of to receive the edges presentedby the lower V I upper edge of the wing plates; said spacer I V I T V s5 panel having a lower flange forming a groove for engaging the upper edge of the ash pit front, the upper edge of the spacer panel resting against the front of the lower edge of the feed tube front, said removable panels g l a v i 160 said shoulder portions of the outside top and being provided with handles to facilitate connection and disconnection thereof, said furnace casing having all parts pertaining to the width thereof, of standard size for all s 40 sizes of furnaces, one of said removable in- I termediate panels being provided with a water receptacle on its inner side, an opening in saidpanel for filling the Water receptacle and a pivoted coverfor the opening.

45 7. In a furnace according to claim 5 said g I I rear wall, and inner side walls comprising double sheet metal walls comprising double sheet metal providing dead air spaces, the

double formation of the inner side walls pro- I a 50' viding a dead air space whichserves as an 1 insulation between the hot and cold air chambers, said outside side walls being provided with upper and lower clips forming grooves for engagement with the lower edges of the an upper edge on the base, said inside side walls having upper clipsforming grooves to receive the inside top or cover'portion for the a I hot air chamber, said horizontal top panels 7 7 m5 and top edges of the inclined shoulder por- I i W tions being provided at said rectangular opening with flanges forming grooves to receive the lower edge of the cold air pipe, said as inside cover portion at its front end having 7 g 

